<template>
  <div class="app-container">

    <!-- 顶部 Header 区域 -->
    <mt-header fixed title="黑马程序员·Vue项目">
        <span @click="goBack" slot="left" v-show="flag">
            <mt-button icon="back">返回</mt-button>
        </span>
    </mt-header>


    <!-- 中间的 路由 router-view 区域 -->
		<transition>
			<router-view></router-view>
		</transition>


    <!-- 底部 Tabbar 区域 -->
    <nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-llb" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart">
					<span class="mui-badge" id="badge">{{ $store.getters.getAllCount }}</span>
				</span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-llb" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>

  </div>
</template>

<script>
export default {
    data() {
        return {
            flag: false
        };
    },
    created() {
        this.flag = this.$route.path === '/home'? false:true
    },
    methods: {
      goBack() {
        this.$router.go(-1);
      }
  },
  watch: {
      "$route.path": function(newVal) {
          if (newVal === '/home') {
              this.flag = false;
          }else {
              this.flag = true;
          }
      }
  }
}
</script>


<style lang="scss" scoped>
.app-container {
  padding-top: 40px;
  overflow-x: hidden;
	padding-bottom: 50px;
}

.v-enter {
  opacity: 0;
  transform: translateX(100%);
}

.v-leave-to {
  opacity: 0;
  transform: translateX(-100%);
  position: absolute;
}

.v-enter-active,
.v-leave-active {
  transition: all 0.5s ease;
}
// 该类名，解决 tabbar 点击无法切换的问题
.mui-bar-tab .mui-tab-item-llb.mui-active {
    color: #007aff;
}

.mui-bar-tab .mui-tab-item-llb {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-llb .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}

.mui-bar-tab .mui-tab-item-llb .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>
